Pot furnace



E. STEINBRUCK POT FURNACE Filed June 10, 1942 5 Sheets-Sheet 1 INVENTOR. [ll/AL E/NfiRl/CK BY 5% AQ'TORNEYS.

NOV. 9 1943. s m uc 2,333,960

POT FURNACE Filed Jun 10, 1942 s SheetsSheet 2 INVENTOR. 151444.40 STE/NBRUCK BY w/ 7ws s. ATTORNEYS.

Nov. 9, 1943. E. STEINBRUCK POT FURNACE 3'S heetS-Shegat a Filed June 10 INVENTOR. WA L 0 Jrsuvmwor Y 5, g 7 A72 ORA/15" Y5.

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Patented Nov. 9, 1943 POT FURNACE Ewald' Steinbruck, Nutley, N. J., assignor to Alfred Heller, Bloomfield, N. J.

Application June 10, 1942,'Serial N0. 446,474?

6 Claims.

This invention relates to new and useful improvements in pot furnaces and particularly it pertains to pot furnaces employed in the heat treatment of metals.

In 'a prior Letters Patent No. 2,296,440, dated September 22, 1942, of one Alfred Heller, there is illustrated a pot furnace and the subject matter of this application is considered an improvement in furnaces of this type.

It is one object of the present invention to provide a novel construction by which certain parts of the furnace, especially those which deteriorate in use, may be readily replaced without necessitating the removal of more permanent portions of the furnace structure.

It is another object of the invention to provide a novel combustion chamber construction which has advantages over that construction illustrated in the application above mentioned.

It is another object of the invention to provide a novel pot chamber construction which greatly decreases damage to the lower portion of the pot.

Other objects of the invention will appear as the nature thereof is better understood for which urpose, reference will be had to the accompanying drawings and the following description thereof.

In the drawings,

Figure 1 is a top plan view of a pot furnace constructed in accordance with the present invention,

Figure 2 is a vertical sectional view thereof on an enlarged scale taken substantially on the line 22 of Figure 1,

Figure 3 is a horizontal sectional view taken substantially on the line 3-3 of Figure 2,

Figure 4 is a horizontal sectional view taken substantially on the line 4-4 of Figure 2, and

Figure 5 is a horizontal sectional view taken substantially on the line 55 of Figure 2.

In the present embodiment of the invention the furnace is illustrated as supported upon a suitable foundation in and as extending above a floor l2 through an opening H therein.

The furnace is preferably of circular form and consists of a furnace housing having a bottom wall l3, side walls l4 and a top wall l5.

Surrounding that portion of the furnace housing which extends above the floor l2, there is a jacket 16, which is spaced from the furnace housing. the Jacket and space serving to reduce the heat radiated from the furnace housing.

The bottom wall I3 of the furnace housing comprises a course ll of insulating brick and a course 18 of fire brick superimposed thereon.

The course of fire brick form the bottom wall of the combustion chamber 2%! which will be hereinafter mor specifically described.

The side walls of the housing are formed by an outer layer H. of insulating brick and an inner layer 22 of fire brick both of which preferably rest directly upon the bottom wall l3 thereof.

The reference numeral 25 designates a horizontal partition which is supported in spaced relation to the bottom wall of the furnace housing, and this partition forms the top wall of the combustion chamber ill.

The partition 25 is formed of carborundum and as best illustrated in Figure 4, it consists of a.

plurality of segmental sections of which four are herein illustrated.

The partition 25 is supported at its central zone by a pedestal or the like, 26, which is also formed of carborundum and which is preferably square in cross-sectional form.

The outer edge of the partition 25 rests upon and is supported by a circular series of supports 21 which are preferably formed of fire brick and which are spaced from each other and also from the side walls of the furnace housing as best illustrated in Figure 5.

Extending through the side walls of the furnace housing there are two tangentially arranged burners 28 which enter the housing at substan-- 7 equal to the outer diameter of the horizontal partition 25. This construction is important since it permits of the removal of any or all of the segmental sections of the horizontal partition 25 without damage to either the supports 21 or to the solid wall section, 30. The solid wall section is also spaced from the side walls of the furnace housing a distance equal to that of the supports 21 as best illustrated in Figure 2 of the drawings.

The solid wall section 30 together with the horizontal partition 25 forms a heat chamber 3|, directly above the partition 25 the purpose of which will be hereinafter described.

section 30 with the solid wall section 30, divides that portion of the furnace housing immediately above the combustion chamber into an annular gas chamber'56 and a pot chamber 51. I

The heat chamber 3| heretofore mentioned forms the lower portion of the pot chamber and communication between the gas chamber and the pot chamber is established through the medium of the voids or spaces 31 or the checker work wall 35.

The top wall I of the'furnace housing comprises a course 40 of fire brick which extends across and closes the upper end of the annular gas chamber 56, the course 40 resting upon and being supported by the side walls of the furnace housing and the checker work wall 35.

Supported upon the course 40 of fire brick, there is a circular series of spaced supports 44, and an annular course 45 of fire brick which is spaced from the outer ends of the supports 44, see Figure 3. These supports 44 and the annular course 45 are formed of fire brick and serve to support a course 46 of fire brick in spaced rela-- tion to the course 40 of fire brick as best illustrated in Figure 2.

The spaces 41 between the supports 44 form fiues for the gases to pass from the gas chamber 56 to the annular fiue 48 formed by the outer edges of the supports 44 and the course 45 of fire brick from which it may be carried oil by fiues 49 of which two are shown herein.

A pair of cast iron plates 50 and 5| are positioned upon the top wall l5 ofthe furnace housing and these plates have openings of an internal diameter to receive the pct 52 which has an annular flange 53"by which the pot is supported in the pot chamber 51 from the top wall of the furnace housing. v

The pot 52 is of such length that its bottom Wall lies in substantially the same plane as that of the upper edge or face of the solid wall section 30.

By this construction, the bottom wall of the pot forms the top wall of the heat chamber 3| heretofore mentioned by which it is heated without being subjected to the direct action of the gases as they enter the pot chamber through the checker Work wall.

The manner in which the furnace operates will now .be described.

Gases from the combustion chamber pass through the spaces between the supports 21 into the gas chamber 56 from whence they pass through the voids or spaces 31 of the checkerwork wall into the pot chamber where they contact the sides of the pot 52.

While a circulation of the gases is to some extent present in the heat chamber 3 i, this chamber is also heated by radiation of from the horizontal partition 25 and thus the bottom wall of the pot is not subjected to the more intense heat of the hot gases as they enter the pot chamber. Such a construction as herein shown has been found to be high y efficient as far as proper heating of the pot is concerned and at the same time prolongs the life of the pot.

From the pot chamber, the gases pass through the fiues 45, 4-1 and 49 to suitable stacks 60, by

which they may becarried to a suitable point of discharge.

By constructing the partition 25 of sections and by supporting the solid wall section and the checker work wall independently of the partition 25, any or all of the sections of the partition 25 may be removed without disturbance of any of the more permanent portions of the structure.

The supports 21 of the horizontal partition 25 also form baflles, which, by reason of-thelr arrangement in a circular series and thefact that the burners are tangentially arranged,pro

duces a swirling action in the combustion chamber which is conducive to obtaining high temperatures therein. The supports 2'! also serve to divert the gases from the outer portion of the swirling mass within the combustion chamber by reason of the gases impinging against the side walls of thesecsupports and thereby being directed intothe gas chamber.

Having thus described the invention, what is claimed as new is:

L'A pot furnace comprising a furnace housing, a horizontally disposed partition supported from the bottom wallvof the housing in spaced relation thereto to form a combustion chamber,

, a central pedestal for supporting the central porting said horizontal partition in spaced re- 1 portion of said horizontal partition, a series of spaced supporting elements for supporting the outer edges of the horizontal partition, a solid wall section extending vertically from and supported by the supporting elements of the outer edges of the horizontal partition, a checker work wall section extending vertically from the solid wall section, said solid wall section and said checker work wall section being spaced from the walls of the furnace housing to form a gas chamber having communication with the combustion chamber through the spaces between the outer edge supporting elements of the horizontal partition, a pot chamber having communication with the gas chamber through the voids or spaces of the checker work wall, burners leading through the walls of the furnace housing to thecombustion chamber, a top wall for closing the upper portion of the gas chamber, take-off flues leading from the upper end of the pot chamber, and a pot supported in the pot chamber in spaced relation to the checker Work wall.

2. A pot furnace comprising a furnace housing, a sectional horizontal partition, means for suplation to the bottom wall of the housing to form a combustion chamber, a solid wall section rising from and supported by the horizontal partition supporting means independently of the horizontal partition, a checker work wall rising from and supported by the solid wall section, said horizontal partition supporting means, solid wall and-checker work wall being spaced from the side walls of the housing to provide a gas chamber having communication with the combustion chamber through the supporting means of the horizontal partition, a pot chamber having communication with the gas chamber through voids or spaces of the checker work well, a top wall for the furnace housing, burners extending through the side walls of the furnace housing into the combustion chamber, flues for discharging gases from the furnace housing, and a pot supported in the pot chamber in spaced relation to the side and bottom Walls thereof.

3. A pot furnace comprising a furnace housing, a sectional horizontal partition, means, for

supporting said horizontal partition in spaced relation to the bottom wall of the housing to I form a combustion chamber, a solid wall section rising from and supported by the horizontal partition, supporting means independently of the horizontal partition, a checker work wall rising from and supported by the solid wall section, said horizontal partition supporting means, solid wall and checker work wall being spaced from the side walls of the housing to provide a gas chamber extending throughout the height of the furnace housing and having communication with the combustion chamber through the supporting means of the horizontal partition, a pot chamber having communication with the gas chamber through voids or spaces of the checker work wall, a top wall for the furnace housing, burners extending through the side Walls of the furnace housing into the combustion chamber, fiues for discharging gases from the furnace housing, and a pot supported in the pot chamber in spaced relation to the side and bottom walls thereof.

4. A pot furnace comprising a furnace housing, a circular series of spaced supporting elements supported from the bottom wall of the furnace housingin spaced relation to the side walls thereof, a single support disposed centrally of said circular series of supporting elements, a solid wall section rising from and supported by said circular series of supporting elements, a sectional horizontal partition supported upon the circular series of supporting elements and the centrally disposed single support, said horizontal partition together with the circular series of spacing elements, and the bottom wall of the furnace housing, forming a combustion cham ber below the horizontal partition, and together with the solid wall section providing a heat chamber immediately above the horizontal partition, burners leading through the side walls of the furnace housing and the spaces between the spaced supporting elements to the combustion chamber, a checker work wall rising from and supported by the solid wall section and dividing that portion of the housing above the plane of the horizontal partition into a gas chamber having communication with the combustion chamber through the spaces of the supporting elements of the solid wall section and the horizontal partition and with the pot chamber through the voids or spaces of the checker work wall, a pot supported within the pot chamber, and means for discharging gases from the pot chamber.

5. In a pot furnace, a furnace housing, a combustion chamber, a gas chamber and. a pot chamber, said pot chamber having a lower solid wall section and an upper checker work wall section, and a pot supported in the pot chamber with its sides in spaced relation to the upper checker work wall section and its bottom wall in a plane corresponding to the plane of the top of the solid wall section, said checker work wall section completely surrounding said pot.

6. In a pot furnace, a furnace housing, a horizontal partition mounted in the bottom of the furnace housing in spaced relation thereto to form a combustion chamber, a central support and a circular series of spaced supports for supporting the horizontal partition in position, the spaces between the supports of the circular series form fines for the escape of hot gases from the combustion chamber, tangentially disposed bumers leading into the combustion chamber, a, pot supported above the horizontal partition with its bottom wall in spaced relation thereto, a solid wall surrounding said partition and extending to a point coinciding with the bottom wall of the pot, a checker work wall extending from the top of the solid wall section throughout the eflective length of the pot, said checker work wall being spaced from the side walls of the housing and from the pot, and a top wall for closing the furnace housing, said top wall having take-ofl flues leading therethrough from the pot chamber.

E'WALD STEINBRUCK. 

